How to connect the air lock valve to the positioner to achieve continuous position control of the cylinder
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I want to control the liquid level by adjusting a plug valve in conjunction with a level gauge; I don’t want to use electric actuators, but rather cylinders. I’ve heard that using an intelligent positioner together with a gas lock valve can achieve this. I would like to ask the experts here how to select the appropriate components and how to connect the gas circuit
No DCS, PLCs, or standalone controllers on site or anything like that?
Yes, mainly it concerns how to connect the air pathways between the positioner, the air lock valve, and the cylinders.
It’s the sequence you mentioned: the air supply enters the locator, then the air lock valve, and finally the cylinder. The actual connections should be quite simple, right?
The purpose is merely to regulate the liquid level; a lock valve is not necessary. The main function of a lock valve is to keep the position stable in case the pressure of the gas supply is too low.